เกจวัดแรงดันแบบแห้ง keeps Tunnel boring machine (TBM) cool by a continuous water supply. The Cross Rail venture is an east-west rail route that passes beneath the town of London utilizing new twin-bore 21km tunnels.
EuroFlo pumps and the tanks are situated on the floor; the water is pumped from there right down to the shaft and all alongside the tunnel as much as the TBM. Once the water has handed through the TBM system the remaining water comes back by way of a filtration system to the tanks on the surface, out of the tunnel.
The water circuit offers 20 l/s to every TBM and eight l/s is used within the TBM for different works and 12 l/s returns to the tanks. The inlet pressure wanted ranges between 4 and 10 bar. On one site three TBM’s are working and the pump system delivers 60 l/s, with the gear consisting of one single tank (3200m3) and one industrial pump used per tunnel. On another website, the set up support’s the excavation with only one TBM with 20 litres/second and the water storage tank capability of 1100m3
EuroFlo use 37 kW vertical multistage Industrial pumps for the cooling system while the TBM excavates through a serious underground part of the Cross rail challenge.